Three driving bands keep this Russian slug design very stable after it leaves the muzzle. The Flybot weighs about 445 grains when cast out of pure lead. It is meant to be used with a gas seal wad and has a hole in its base to put an attaching screw through. The screw also acts as a pressure point to open the hollow point leaves. It comes with one plug to make the hollow point design ,as well as a box and instructions. No bullets are included.